Chemical and local control of red palm weevil, Rhynchophorus ferrugineus in infested palm trees

Document Type : Research Paper

Authors

Department of Plant Protection, Faculty of Agriculture, University of Zabol, Zabol, Iran

Abstract

The red palm weevil, Rhynchophorus ferrugineus, is the most important internal quarantine pest in Iran. Injecting insecticides into the tree trunk is one of the methods for pest control. This research investigated the effect of cypermethrin (40% EC) and acetamiprid (20% SP) on controlling ‎red palm weevil in a completely randomized design experiment with three ‎replications. The treatments included a control (water injection) and injections of cypermethrin at concentrations of 2.5, 3.75-, and 5-mL L⁻¹, acetamiprid at concentrations of 5, 7.5, and 10 g L⁻¹, and combinations of the two insecticides. The insecticide injections were carried out in two stages. In the first stage, a hole was made in the tree trunk, and one week later, the second stage involved injecting the insecticides. The results showed that the injection of both insecticides significantly reduced the number of live larvae and adults, with the combined treatment of 5 mL L⁻¹of cypermethrin + 10 g L⁻¹ of acetamiprid leading to the lowest number of live larvae and adults. The combination of 5 mL L⁻¹ of cypermethrin + 10 g L⁻¹ of acetamiprid caused the highest adult mortality compared to 5 g L⁻¹ (77.02%) and 7.5 gL⁻¹ (87.37%) of acetamiprid. Additionally, combining the highest concentration of cypermethrin (5 mL L⁻¹) with different concentrations of acetamiprid resulted in the highest percentage of larval mortality. The results indicated that the combined injection of two insecticides proved highly effective and promising, making it suitable for integrated pest management (IPM) programs.

Keywords

References

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Journal of Applied Research in Plant Protection
Volume 14, Issue 2
July 2025
Pages 101-108

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History

  • Receive Date: 04 May 2024
  • Revise Date: 25 October 2024
  • Accept Date: 26 October 2024

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